package org.littlesun.management.ui.test;

import java.io.IOException;
import java.io.InputStream;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTError;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.browser.CloseWindowListener;
import org.eclipse.swt.browser.LocationEvent;
import org.eclipse.swt.browser.LocationListener;
import org.eclipse.swt.browser.OpenWindowListener;
import org.eclipse.swt.browser.ProgressEvent;
import org.eclipse.swt.browser.ProgressListener;
import org.eclipse.swt.browser.StatusTextEvent;
import org.eclipse.swt.browser.StatusTextListener;
import org.eclipse.swt.browser.TitleEvent;
import org.eclipse.swt.browser.TitleListener;
import org.eclipse.swt.browser.VisibilityWindowListener;
import org.eclipse.swt.browser.WindowEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.ProgressBar;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.ToolItem;

public class SWTBrowserDemo {
  int index;

  boolean busy;

//  Image images[];

//  Image icon = null;

  boolean title = false;

  Composite parent;

  Text locationBar;

  Browser browser;

  ToolBar toolbar;

  Canvas canvas;

  ToolItem itemBack, itemForward;

  Label status;

  ProgressBar progressBar;

  SWTError error = null;

//  static final String[] imageLocations = { "eclipse01.bmp", "eclipse02.bmp",
//      "eclipse03.bmp", "eclipse04.bmp", "eclipse05.bmp", "eclipse06.bmp",
//      "eclipse07.bmp", "eclipse08.bmp", "eclipse09.bmp", "eclipse10.bmp",
//      "eclipse11.bmp", "eclipse12.bmp", };

  static final String iconLocation = "document.gif";

  public SWTBrowserDemo(Composite parent, boolean top) {
    this.parent = parent;
    try {
      browser = new Browser(parent, SWT.BORDER);
    } catch (SWTError e) {
      error = e;
      /* Browser widget could not be instantiated */
      parent.setLayout(new FillLayout());
      Label label = new Label(parent, SWT.CENTER | SWT.WRAP);
      label.setText(getResourceString("BrowserNotCreated"));
      parent.layout(true);
      return;
    }
    initResources();
    final Display display = parent.getDisplay();
    browser.setData(
        "org.eclipse.swt.examples.browserexample.BrowserApplication",
        this);
    browser.addOpenWindowListener(new OpenWindowListener() {
      public void open(WindowEvent event) {
        Shell shell = new Shell(display);
//        if (icon != null)
//          shell.setImage(icon);
        shell.setLayout(new FillLayout());
        SWTBrowserDemo app = new SWTBrowserDemo(shell, false);
//        app.setShellDecoration(icon, true);
        event.browser = app.getBrowser();
      }
    });
    if (top) {
      browser.setUrl(getResourceString("Startup"));
      show(false, null, null, true, true, true, true);
    } else {
      browser.addVisibilityWindowListener(new VisibilityWindowListener() {
        public void hide(WindowEvent e) {
        }

        public void show(WindowEvent e) {
          Browser browser = (Browser) e.widget;
          SWTBrowserDemo app = (SWTBrowserDemo) browser
              .getData("org.eclipse.swt.examples.browserexample.BrowserApplication");
          app.show(true, e.location, e.size, e.addressBar, e.menuBar,
              e.statusBar, e.toolBar);
        }
      });
      browser.addCloseWindowListener(new CloseWindowListener() {
        public void close(WindowEvent event) {
          Browser browser = (Browser) event.widget;
          Shell shell = browser.getShell();
          shell.close();
        }
      });
    }
  }

  /**
   * Disposes of all resources associated with a particular instance of the
   * BrowserApplication.
   */
  public void dispose() {
    freeResources();
  }

  /**
   * Gets a string from the resource bundle. We don't want to crash because of
   * a missing String. Returns the key if not found.
   */
  static String getResourceString(String key) {
      return key;
  }

  public SWTError getError() {
    return error;
  }

  public Browser getBrowser() {
    return browser;
  }

  public void setShellDecoration(Image icon, boolean title) {
//    this.icon = icon;
    this.title = title;
  }

  void show(boolean owned, Point location, Point size, boolean addressBar,
      boolean menuBar, boolean statusBar, boolean toolBar) {
    final Shell shell = browser.getShell();
    if (owned) {
      if (location != null)
        shell.setLocation(location);
      if (size != null)
        shell.setSize(shell.computeSize(size.x, size.y));
    }
    FormData data = null;
    if (toolBar) {
      toolbar = new ToolBar(parent, SWT.BORDER);
      data = new FormData();
      data.top = new FormAttachment(0, 5);
      toolbar.setLayoutData(data);
      itemBack = new ToolItem(toolbar, SWT.PUSH | SWT.BORDER);
      itemBack.setText(getResourceString("Back"));
      itemForward = new ToolItem(toolbar, SWT.PUSH | SWT.BORDER);
      itemForward.setText(getResourceString("Forward"));
      final ToolItem itemStop = new ToolItem(toolbar, SWT.PUSH | SWT.BORDER);
      itemStop.setText(getResourceString("Stop"));
      final ToolItem itemRefresh = new ToolItem(toolbar, SWT.PUSH| SWT.BORDER);
      itemRefresh.setText(getResourceString("Refresh"));
      final ToolItem itemGo = new ToolItem(toolbar, SWT.PUSH);
      itemGo.setText(getResourceString("Go"));

      itemBack.setEnabled(browser.isBackEnabled());
      itemForward.setEnabled(browser.isForwardEnabled());
      Listener listener = new Listener() {
        public void handleEvent(Event event) {
          ToolItem item = (ToolItem) event.widget;
          if (item == itemBack)
            browser.back();
          else if (item == itemForward)
            browser.forward();
          else if (item == itemStop)
            browser.stop();
          else if (item == itemRefresh)
            browser.refresh();
          else if (item == itemGo)
            browser.setUrl(locationBar.getText());
        }
      };
      itemBack.addListener(SWT.Selection, listener);
      itemForward.addListener(SWT.Selection, listener);
      itemStop.addListener(SWT.Selection, listener);
      itemRefresh.addListener(SWT.Selection, listener);
      itemGo.addListener(SWT.Selection, listener);

      canvas = new Canvas(parent, SWT.NO_BACKGROUND);
      data = new FormData();
      data.width = 24;
      data.height = 24;
      data.top = new FormAttachment(0, 5);
      data.right = new FormAttachment(100, -5);
      canvas.setLayoutData(data);

//      final Rectangle rect = images[0].getBounds();
//      canvas.addListener(SWT.Paint, new Listener() {
//        public void handleEvent(Event e) {
//          Point pt = ((Canvas) e.widget).getSize();
//          e.gc.drawImage(images[index], 0, 0, rect.width,
//              rect.height, 0, 0, pt.x, pt.y);
//        }
//      });
      canvas.addListener(SWT.MouseDown, new Listener() {
        public void handleEvent(Event e) {
          browser.setUrl(getResourceString("Startup"));
        }
      });

      final Display display = parent.getDisplay();
      display.asyncExec(new Runnable() {
        public void run() {
          if (canvas.isDisposed())
            return;
          if (busy) {
            index++;
//            if (index == images.length)
//              index = 0;
            canvas.redraw();
          }
          display.timerExec(150, this);
        }
      });
    }
    if (addressBar) {
      locationBar = new Text(parent, SWT.BORDER);
      data = new FormData();
      if (toolbar != null) {
        data.top = new FormAttachment(toolbar, 0, SWT.TOP);
        data.left = new FormAttachment(toolbar, 5, SWT.RIGHT);
        data.right = new FormAttachment(canvas, -5, SWT.DEFAULT);
      } else {
        data.top = new FormAttachment(0, 0);
        data.left = new FormAttachment(0, 0);
        data.right = new FormAttachment(100, 0);
      }
      locationBar.setLayoutData(data);
      locationBar.addListener(SWT.DefaultSelection, new Listener() {
        public void handleEvent(Event e) {
          browser.setUrl(locationBar.getText());
        }
      });
    }
    if (statusBar) {
      status = new Label(parent, SWT.NONE);
      progressBar = new ProgressBar(parent, SWT.NONE);

      data = new FormData();
      data.left = new FormAttachment(0, 5);
      data.right = new FormAttachment(progressBar, 0, SWT.DEFAULT);
      data.bottom = new FormAttachment(100, -5);
      status.setLayoutData(data);

      data = new FormData();
      data.right = new FormAttachment(100, -5);
      data.bottom = new FormAttachment(100, -5);
      progressBar.setLayoutData(data);

      browser.addStatusTextListener(new StatusTextListener() {
        public void changed(StatusTextEvent event) {
          status.setText(event.text);
        }
      });
    }
    parent.setLayout(new FormLayout());

    Control aboveBrowser = toolBar ? (Control) canvas
        : (addressBar ? (Control) locationBar : null);
    data = new FormData();
    data.left = new FormAttachment(0, 0);
    data.top = aboveBrowser != null ? new FormAttachment(aboveBrowser, 5,
        SWT.DEFAULT) : new FormAttachment(0, 0);
    data.right = new FormAttachment(100, 0);
    data.bottom = status != null ? new FormAttachment(status, -5,
        SWT.DEFAULT) : new FormAttachment(100, 0);
    browser.setLayoutData(data);

    if (statusBar || toolBar) {
      browser.addProgressListener(new ProgressListener() {
        public void changed(ProgressEvent event) {
          if (event.total == 0)
            return;
          int ratio = event.current * 100 / event.total;
          if (progressBar != null)
            progressBar.setSelection(ratio);
          busy = event.current != event.total;
          if (!busy) {
            index = 0;
            if (canvas != null)
              canvas.redraw();
          }
        }

        public void completed(ProgressEvent event) {
          if (progressBar != null)
            progressBar.setSelection(0);
          busy = false;
          index = 0;
          if (canvas != null) {
            itemBack.setEnabled(browser.isBackEnabled());
            itemForward.setEnabled(browser.isForwardEnabled());
            canvas.redraw();
          }
        }
      });
    }
    if (addressBar || statusBar || toolBar) {
      browser.addLocationListener(new LocationListener() {
        public void changed(LocationEvent event) {
          busy = true;
          if (event.top && locationBar != null)
            locationBar.setText(event.location);
        }

        public void changing(LocationEvent event) {
        }
      });
    }
    if (title) {
      browser.addTitleListener(new TitleListener() {
        public void changed(TitleEvent event) {
          shell.setText(event.title + " - "
              + getResourceString("window.title"));
        }
      });
    }
    parent.layout(true);
    if (owned)
      shell.open();
  }

  /**
   * Grabs input focus.
   */
  public void focus() {
    if (locationBar != null)
      locationBar.setFocus();
    else if (browser != null)
      browser.setFocus();
    else
      parent.setFocus();
  }

  /**
   * Frees the resources
   */
  void freeResources() {
//    if (images != null) {
//      for (int i = 0; i < images.length; ++i) {
//        final Image image = images[i];
//        if (image != null)
//          image.dispose();
//      }
//      images = null;
//    }
  }

  /**
   * Loads the resources
   */
  void initResources() {
//    final Class clazz = this.getClass();
//      try {
//        if (images == null) {
//          images = new Image[imageLocations.length];
//          for (int i = 0; i < imageLocations.length; ++i) {
//            InputStream sourceStream = clazz
//                .getResourceAsStream(imageLocations[i]);
//            ImageData source = new ImageData(sourceStream);
//            ImageData mask = source.getTransparencyMask();
//            images[i] = new Image(null, source, mask);
//            try {
//              sourceStream.close();
//            } catch (IOException e) {
//              e.printStackTrace();
//            }
//          }
//        }
//        return;
//      } catch (Throwable t) {
//      }
//    String error = "Unable to load resources";
//    freeResources();
//    throw new RuntimeException(error);
  }

  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    shell.setText(getResourceString("window.title"));
    //InputStream stream = SWTBrowserDemo.class
     //   .getResourceAsStream(iconLocation);
    //Image icon = new Image(display, stream);
    //shell.setImage(icon);
    //try {
    //  stream.close();
    //} catch (IOException e) {
    //  e.printStackTrace();
    //}
    SWTBrowserDemo app = new SWTBrowserDemo(shell, true);
    //app.setShellDecoration(icon, true);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    //icon.dispose();
    app.dispose();
    display.dispose();
  }
}


